HVAC & window seat

["Eric J Russell" <ejrussell@mebtel.net>]

I am planning to build (in my shop...) some bookcases with a 'window seat'.
We have forced hot air/AC in our house.

I can either route the air duct under the window seat through a toe space or
up along the wall to near the window sill through the window seat's seat
area.

I have done the former many times in kitchen cabinetry. Is there any
advantage to one method vs the other.

TIA,
Eric Russell